My new XR2206 function generator. Based on an ELEKTOR circuit diagram from 1977. The XR-2206 is a monolithic function generator integrated circuit.
Features:
+ Square, sine, triangle, sawtooth wave output or pulses.
+ Frequency range from 10 Hz to around 200 kHz.
+ Amplitudes from around 0.01 V to 4 V (or more)
+ Audio output is possible
For demonstration a digital storage oscilloscope DSO 062 from JYE-Tech and a speaker were connected to the output.
Frequency can be adjusted by a ten turn wirewound precision potentiometer + multiplicator (x1, x10, x100, x1000) + another x2 multplicator.
Surprisingly most of the 1970s electrical components are still available. So it is ~ 99% the 1977 model. Only the original voltage regulator had to be replaced by a 7812 .
It should be noted that nowadays simple sound cards are better and cheaper function generators. However, I like this old technique. ;-)
Elektor kindly gave me the permission to post the links to the original articles from 1977 (German and English language):
www.elektor.de/120068
and
www.elektor.com/120068
